http://www.greenpeace.org/usa........a.... : ExxonSecrets, a project of Greenpeace which documents in interactive and graphic form the connections between global warming denialists and their corporate supporters, including political think-tanks.

http://cdiac.ornl.gov/:....: The Carbon Dioxide Information Analysis Center (CDIAC) is the primary climate-change data and information analysis center of the U.S. Department of Energy (DOE).

http://www.globalwarmingart.com/:....: Global Warming Art is the result of a dream that the public and educators should have easy access to the same data and results that have framed the scientific discussion of global warming and climate change.

http://www.aip.org/history....ex.htm: This Website, created by Spencer Weart, supplements his much shorter book, which tells the history of climate change research as a single story. On this Website you will find a more complete history in dozens of essays on separate topics, occasionally updated.